Alcohol Units Calculator (UK)

UK alcohol units measure pure alcohol; one unit = 10 ml (8 g) of alcohol.

How the Math Works

The Alcohol Units Calculator uses a straightforward formula to determine the alcohol content of a drink: units = volume (ml) × ABV% ÷ 1000. This equation multiplies the total volume of the beverage in millilitres by its alcohol by volume percentage, then divides by 1000 to convert the result into standard UK alcohol units. For example, a 330ml bottle of beer at 5% ABV would calculate as 330 × 5 ÷ 1000 = 1.65 units. The division by 1000 effectively scales the product down to the unit measurement system used in the UK for tracking alcohol consumption.

Practical Applications

To use this calculator practically, first measure or locate the total volume of your drink in millilitres (ml) and find the ABV percentage listed on the label or container. Enter these values into the calculator: multiply the volume by the ABV percentage, then divide by 1000 to get the number of units. For instance, a standard 175ml glass of wine at 12% ABV contains 2.1 units (175 × 12 ÷ 1000 = 2.1). You can use this calculation for any drink - from a single shot of spirits to an entire bottle of cider - to accurately track your alcohol intake across multiple beverages during an evening or drinking session.

Day-to-Day Use

Understanding alcohol units helps you make informed choices about your drinking habits and stay within recommended limits. The UK guidelines suggest men should not exceed 14 units per week and women 14 units, spread over at least three days. By calculating units in your drinks, you can better monitor your consumption, plan your alcohol intake around social events, or track your progress if you're reducing your drinking. This knowledge is especially valuable when dining out, attending parties, or purchasing multi-packs of drinks, as it allows you to make informed decisions about portion sizes and total intake before reaching your personal limits.

Worked example

500 ml at 5% → 2.5 units.

FAQ